diff --git a/sys/include/net/gnrc/ndp/internal.h b/sys/include/net/gnrc/ndp/internal.h
index c57ac2a7cc..ab23c63e82 100644
--- a/sys/include/net/gnrc/ndp/internal.h
+++ b/sys/include/net/gnrc/ndp/internal.h
@@ -23,6 +23,7 @@
 #define GNRC_NDP_INTERNAL_H_
 
 #include "kernel_types.h"
+#include "net/gnrc/ipv6/nc.h"
 #include "net/ipv6/addr.h"
 #include "net/ipv6/hdr.h"
 #include "net/ndp.h"